How much magnesium are we talking about here?

I actually have magnesium in my supplement drawer : "Magnesium Carbonate from natural sources" - it says take 2 grams, max 4 grams and let it "sit in cold water for 10 minutes, or warmer water for 10 seconds" before drinking.

Is that the range you are taking and is the l-threonate form much better, ie. is carbonate useless?

Interested in trying this out later this night..